1. Department of Medicine Division of Hematology Johns Hopkins University School of Medicine Baltimore MDUSA
2. Divisions of Transfusion Medicine and Hematology Vanderbilt University Medical Center Nashville TNUSA
3. Department of Medicine Division of Hematology/Oncology University of Texas Southwestern Dallas TXUSA
4. Department of Obstetrics, Gynecology and Reproductive Sciences University of Miami Miller School of Medicine Miami FLUSA
5. Division of Pediatric Hematology Department of Pediatrics Cincinnati Children’s Hospital Cincinnati OH USA
6. Department of Obstetrics & Gynecology Division of Maternal‐Fetal Medicine Department of Medicine Division of Hematology Duke University Durham UK
7. Division of Hematology The Children’s Hospital of Philadelphia Philadelphia PA USA